[4J2-GS-6e] 言語メディア処理：自然言語処理(2/2)

[4J2-GS-6e-03] Automatic Scoring for Picture Description Problems

〇Kento Tanaka¹, Taichi Nishimura¹, Keisuke Shirai¹, Hirotaka Kameko¹, Shinsuke Mori¹ (1. Kyoto University)

Keywords:Natural Language Processing, Auto Scoring, Picture Describing

In language learning, training output skill such as speaking and writing is vital in order to retain the learned knowledge. However, scoring descriptive questions by humans would be costly, and this is why automatic scoring systems attract attention. In this research, we try to realize an automatic scoring system for picture description. Concretely, (i) we first analyze the trends of errors that English learners would make, (ii) then create a pseudo dataset by artificially mimicking the errors, and (iii) finally consider a model that judges whether a given pair of a picture and a sentence is valid or not. In experiments, we trained the model with the created pseudo data and evaluate it with the answers provided by actual learners. From experimental results, we found that our model outperforms a random agent.